by Graeme » Wed 04 Jun 2014, 20:28:25
It’s official: Everybody loves the idea of roads that generate solar power
$this->bbcode_second_pass_quote('', 'L')ast month, we asked whether solar roads could generate enough energy to serve some of the nation’s power needs.
With tens of thousands of miles of solar-power generating roads, parking lots, sidewalks and other open spaces–without needing to clear space in untouched, natural areas–it seems like an ideal, if expensive solution.
It’s one that’s caught the public’s imagination though. The company proposing the idea, Solar Roadways, has smashed its Indiegogo crowdfunding campaign target of $1 million.
In fact, it’s now at $1.9 million committed, and its deadline has been extended to June 20.
Now it’s important to note: Widespread public support in no ways guarantees success.
But the couple behind Solar Roadways, Scott and Julie Brusaw, have clearly struck a chord with their backers.
They’ve also developed a product that, at the prototype stage, answers a whole lot of difficult questions that startup companies aren’t always prepared to answer.
Again, proper solar roads are a long way off. Replacing every single mile of U.S. highway with solar panels could be a hundred years away, and there are still many hurdles to overcome.
venturebeatAre solar panel road surfaces the path to the future?$this->bbcode_second_pass_quote('', 'N')ote that all these proposed uses of a solar roadway are also ways for such a project to generate revenues. Figuring out ways to make a solar roadway project economically feasible will be a huge challenge, says Gregory Wilson, director of the National Center for Photovoltaics at the National Renewable Energy Laboratory, which is part of the US Department of Energy.
While the Brusaws are using some proven technologies, such as silicon solar cells and LED lighting, they need to design them to work well together and under weather and road conditions that pose different challenges to conventional solar panel installation (on a rooftop or in the field) or LED traffic signals and street lighting.
A novel technology often costs more, at least initially, until it's made in enough volume to reduce manufacturing expenses. Its price should also come down when there is enough demand to help recoup the initial research and development cost.
Then there is the expense of maintaining a solar roadway. It will require monitoring to make sure each panel is producing the expected amount of solar electricity. Repairing or replacing the components, if not each panel, will have to be easy to minimise the extent of roadway closures.
Keeping a solar roadway clear of dirt and debris and out of shade, all of which lower electricity generation, will also be crucial in making the project financially attractive, Wilson said. The Solar Roadway project is attempting to address many of these operational and maintenance issues.
The Brusaws wants to start making and selling their rugged solar panels before the end of the year. The city of Sandpoint, where the couple live, is set to become the first customer by installing the solar panels at a visitor centre parking lot.